Grinding-mill.



A. M. DELLINGER.

GRINDING MILL.

APPLICATION FILED APR. I. 1915.

1 ,162,579. I Patentgd Nov. 30, 1915.

2 SHEETSSHEET l- VIII/1111177. Immm IIHIIIEWIIIPEMWUI 4111111111111 Jnvenfoz COLUMBIA PLANPGRAPH CO.,WASHINGTON. D. C.

A. M. DELLINGER.

GRINDING MILL.

APPLICATION FILED APR. 1. I915. 1,162,579. Patented Nov. 30, 1915.

2 SHEETS-SHEET 2.

COLUMBIA PLA-NOBRAPH 1:0..wAsmNu'roN, n. c.

lliNlT @AES PATENT @FFlIQE.

ABRAHAM 1V1. DELLINGER, OF LANCASTER, PENNSYLVANIA.

GRINDING-MILL.

Be it known that'I, ABRAHAM M. DEL- LINGER, a citizen of the United States, re-

siding at Lancaster, in the county of Lancaster and State of Pennsylvania, have invented certain new and useful Improvements in Grinding-Mills, of which the following is a specification.

This invention relates to grinding mills of the same general type as that set forth in my Patent 1,074,844, used chiefly for crushing corn and like material by a roll and subsequently grinding it between a pair of disks or'burs, one of the said burs being carried by the same shaft assaid roll.

The objects of this invention are to provide satisfactory means for regulating the supply of material from the crushing mechanism to the grinding mechanism; to provide improved means for regulating the fineness of the grinding and the facilitating the freeing of the running disk at will and thereby ending the grinding action; to improve the efliciency and compactness of the feeding auger and proximate parts; to guard against the escape of particles of the material acted on through the rear Wall of the bur-casing along the shaft; to improve the means of support of the rear end of said shaft; and generally to improve the details and entire construction of the grinding mill.

o these ends, my invention consists the construction and combination of parts as hereinafter more particularly set. forth and claimed.

In the accompanying drawings: Figure 1 represents a perspective view of a grinding mill embodying my invention; Fig. 2, a longitudinal vertical central section of the same, the shaft being shown in side elevation and its forward end, as well as a part 7 of the hopper, crusher roll and concave be ing broken away; Fig. 3 represents a transverse section on the line 33 of Fig. 2, looking rearward and showing more plainly the rear bearing, its supports and the means for adjusting the shaft endwise; Fig. 1, adetail view in elevation of the inner face of the rear wall of the bur-casing; Fig. 5, a detail rear elevation showing the slides and operating lever; Fig. 6, a detail view of the stationary grinding disk and-the section of the bur-casing in which it is mounted; F ig. 7., a

7 central cross section through the disk 7 illus- Specification of Letters Patent.

The shaft 1, carrying crushing roll 2 and grinding disk 6, is driven by a belt-wheel 8 and has a fly-wheel 8 mounted on it in proximity thereto, these and all other parts of the machine being supported by a frame 9. Said crushing roll 2 operates in proX- imity to a concave 3, both of said parts being suitably fluted or provided with crushing lugs and arranged within the lower part of a hopper l, whereby they are supplied with fodder or other material to be crushed between them. Said crushing roll extends to a small sleeve or collar 10 onsaid shaft, this sleeve being located within the opening in the nearer face of the bur-casing 11, through which opening the crushed material must pass in between the disks or burs 6 and 7 arranged face to face as usual, the latter disk being mounted pivotally by an annular peripheral band 7*, having trunnions 7 in a frame 7 of like form similarly provided with trunnions 7 in a line at right angles to that of trunnions 7 by which trunnions 7 it is set into bearing recesses of the bur-casing as shown in Fig. 6. By this mounting, the disk 7 may yield to present its face exactly parallel to that of disk 6 in case either of them should be slightly out of position, but will necessarily remain fixed as a whole in its location, whereas the other disk 6 may be adjusted toward or from said disk 7 by adjusting the shaft 1 endwise.

Two metallic slides 12 and 13 are arranged to be moved vertically in a guideway it in the front wall of bur-casing 11, the middle parts of their proximate faces being semi-circularly recessed to fit on cylindrical sleeve 10, in which position these slides entirely closecommunication between said hopper and said, bur-casing. In proportion as they are drawn apart a greater openingis made between these slides for the passage of the crushed material. These slides are operated by a lever 15, through a pair of arms 16 and 17, which arms make connection with said lever by means of studs 18 and slots 19, allowing a slight amount of play. Said lever is locked at any point of its movement for adjustment by engaging a rack 20, a flange or ofi'set 15 being made for that purpose and the said lever being metallic and of some resiliency. A thumb- Patented Nov. 30, 1915. Application filed April 7, 1915. Serial No. 19,637. i

. makes the machine more compact.

Heretofore it has been usual to arrange:

the feeding augur 21 at the inlet opening ofthebur-casing 11 and partly or'wholly outside of the same, occupying a part of the space which in this instance I have given to the crushing roll, but I find that it will be quite as'efficrent'if arranged wlthln sald cas ng as shown in my drawings and this onables me to locate the sleeve 10, as above stated, 1n said opening and in positlonfor' contact with the slides 12 and 13 when these are closed upon it, the smooth surface of said sleeve permitting a more exact closure than would be possible with most ordinary shafts. Also my construction obviously While retaining the full length of the crushing roll and concave, I may of course make the hopper and shaft less in length, as the space otherwise required for the auger outside of the bur-casing is available for the crushingroll. 7

The shaft 1 turns in bearings, one of which, not shown, may be on the front wall of the hopper near the fly-wheel and belt-. wheel before mentioned. Another bearing 22 for said shaft is a tubular integral eX- tension of the rear wall of bur-casing 11. Bearing 23 is of cap-form, fitting the rear end of said shaft and being provided internally with a bearing ball 23, also, exteriorly with radial lugs 24, which fit into pockets 25 of an annular frame 26, having at diametrically opposite points a pair of rigid radial fingers 27 and 28, which enter respectively longitudinal slots 29 and 30 in the outer parts of long rearward arms 31 and 32 rigid with the rear wall of bur-casing 11; An adjusting screw 33' passing through the rear wall of the slot in the lower arm 32, bears against the lower finger 28 to force it forward or when turned back will permit said frame, finger, shaft and disk to be correspondingly forced back and held back by the material. Thus'said screw determines the interval between the two disks and the fineness of the grinding; and by a slight movemnt it may compensate for a small error in the vertical position of said disk. A lever 34:, having its actu ating end formed into a cam 34L is pivoted on arm 31 so that when said lever is closed down on the latter it will force said finger forward, holding the shaft 1 and disk 6 in the most forward position consistent with the adjustment of screw 33. By turning back the said lever, the shaft and running disk'6 may be instantly freed, and by turning said lever forward they may be locked again in position for grinding.

drawal of the operative parts.

The bur-casing 11 consists preferably of two detachable sections or semi-casings, normally bolted together as is common. This will facilitate: the. assembling and withwall of the casing, as shown in Fig. 4, has on its inner face an integral semi-circular flange 35,-extending forward to therear disk over a thickened central part of the rear face thereof and in close proximity to 3.

the same, the ends of said deflector also extending down below the middle of said shaft, so that any comminuted material passing. up from between the disk and over the top of rear disk 7 will fallen to the top of said flange 35 and be deflected'by the same downward to the lower part of the casing, escaping, like all other material ground by said disks, through the dischargeopening 43at the bottom of said casing. It is thus effectively prevented from following the shaft through the rear wall of said bur-casing.

The rear 1v The grinding burs or disks 6 and 7 are alike in the dress of their operating faces, hence it is thought sufiicient to draw one of them (disk 7) in face view in Fig. 6 and section in Fig. 7 This has a series of long sharp teeth or hooks 36 of various lengths projecting at various angles into the central open space 7 of the disk. Theedges of each of these hooks or teeth are curved in outline, as shown at 37 forming recesses or pockets for better holding the cobs when ears of corn are ground in the mill. The grinding faces of these points 1 are formed by the inner parts of ribs 38, which are arranged in groups, the individual ribs of each group being parallel to each other and corresponding indirection in each group to that of the corresponding teethv 36.' The said ribs for the most part run from the inner space 7 to the periphery of the disk 7. Additional shorter ribs 40 areused to fill sufliciently the spacesjbetween the main groups or ribs, in order that all'parts of ward its periphery. The edges of said teeth 36 are in some instances perpendicularto the face of the disk, in others inclined.

The ribs 38 are provided with oblique branches 39 which have hitherto been used, but'havebeen so arranged as to'o-verlap in' the line of outward flow of the ground material. I construct and arrange said ribs so that thesebranches do not overlap, but leave a clear outlet space or lane 41 between each pair of them in each group for the free passage of ground material. This is not always practicable in the case of the shorterribs 40 filled in between the. groups andin such instances cross-cuts or' openings 42 are made to let such material through.

The construction of the teeth 35, curved edges 37 and the pockets, inclined faces and grooves 39 forming collectively the outer wall of central opening 7 is very well adapted to hold and cutand tear parts of cob, stalk or other somewhat refractory material which may come from the crusher-roll and concave to the grinding disks in a more or less crushed but imperfectly disintegrated state, thus completing the preparation for the work of the grinding ribs. The latter are constructed and arranged, as above explained, for the greatest possible efficiency and the least possible obstruction to or by the ground material.

The branches 39 on one side of each rib 38 r are presented at such an angle as to give a shearing cut during the grinding action. The branches on the other side of the rib are presented approximately in line with circles concentric with the shaft and disks and have no grinding or cutting action, but merely slightly retard the outflow of ground material from between the ribs. It is preferred that the greater number of branches should be on the cutting or grinding side of the rib and in a majority of instances shown by Fig. 6 this is the case. It is not indispensible, however, and in some instances they are shown exactly equal in number on both sides or with the majority of branches that does not grind. The disks constructed as above described do not require So much power as those having the ribs provided as a rule with an equal number of branches or arranged with different inclinations from those above described; nor are they so liable to choke with the ground material.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In combination with a stationary grinding disk, an endwise-movable rotary shaft, a disk rotating with said shaft in proximity to the disk first mentioned and longitudinally movable with said shaft, a bearing for the rear end of said shaft, a part mounted on and adjustable with said bearing, fixed parts engaging and guiding the former part and permitting its forward and rearward movement, means for adjusting said adjustable part, bearing and shaft forward at will and means for locking said part, bearing and shaft in a forward position to which it is thus adjusted for the purpose set forth.

2. In combination with a stationary grinding disk, an endwise movable rotary shaft, a disk rotating with said shaft in proximity to said rotary disk and movable with said shaft longitudinally, a bearing for the rear end of said shaft, an annular frame fitted on and movable with said bearing and provided with two fingers projecting in opposite directions, a pair of fixed arms slotted to engage said fingers and permit their forward and rearward movement, an adjusting screw acting on one of said fingers and a locking device engaging the other finger to hold Said frame bearing, shaft and movable disk in any position to which said screw has adjusted them.

3. In combination with a stationary grinding disk, an endwise movable rotary shaft, a disk rotating with said shaft and movable therewith longitudinally, a casing for said disks, a pair of arms extending rearward from said casing near the top and bottom thereof respectively, and slotted near their rear ends, a bearing fitting as a cap on the rear end of said shaft, a frame in which said bearing is held and which is provided with two diametrically opposite fingers extending respectively into the slots of said arms, an adjusting screw working through the end of the lower arm against the lower finger and a cam-lever mounted on the other arm and movable at will into or out of locking contact with said finger.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

ABRAHAM M. DELLINGER.

Witnesses:

W. H. KREADY, MELO H. HEsT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G. 

